Features:iF Design Award 2015 + new white LED indicator， more perfect.When you use the Miband， you must download the APP named Mi Band. Perfect for Mi Note Pro Mi4 Redmi Redmi2 Note Note2 4G iPhone 5S 6 6 Plus 6S 6S Plus with IOS 7.0 or above.Record daily motion data， Xiaomi bracelet to help you record all-day event， calculate walking distance， and calorie consumption.Smart Vibration alarm clock， simulate wake up naturally status: You can set the alarm on the APP， in front of the preset alarm within 30 minutes， with a slight vibration to wake you from a shallow sleep， when to wake up slowly shallow sleep， naturally wake up closer.Bluetooth real-time synchronization to APP: analysis of movement sleep data， providing health advice.Reminder phone calls: phone calls， the bracelet can be within a certain range sensing phone calls， and in case you have not turned on within a certain time， the bracelet will flash prompts you through. In the outdoor noisy environment， even if the phone placed inside the bag， still do not worry about missing important calls.(Support Android 4.4 or abpve mobile phone with Bluetooth 4.0)Bracelet Binding identity， free password to unlock the phone: Forget about complicated unlock password， gestures， simply raised his hand to move to the next cell phone， "shua" is heard， immediately safe unlocked. Xiaomi account with your 1 on 1 binding， identify your identity， to better protect the safety of mobile phone information.(Perfect support Mi3 Mi4 Redmi Note 4G which needs to upgrade Android4.4 above， support mobile phones with Bluetooth 4.0 Android 5.0 above)Specifications:Brand: XiaomiBattery capacity: 45mAh (Extremely narrow 8mm Battery)Input Current: 25mAInput voltage: DC 5.0VBluetooth: 4.0Metal surface material: Full magnesium-alloyWristband Material: Dow Corning TPSIVBody shell: PolycarbonateWaterproof rate: IP67Adjustable wristband length: 157mm to 205mmSubject size: 3.6 * 1.4 * 0.9cm / 1.4 * 0.6 * 0.4inSubject weight: 5g / 0.2ozPackage size: 9.6 * 9.6 * 3.1cm / 3.7 * 3.7 * 1.2inPackage weight: 95g / 3.35ozPackage list:1 * Smart Bracelet Subject1 * Wristband1 * Charger